public LevelGeometry()
{
_tunnelElementsQueue = new Queue <Tunnel>();
// Get position.
Vec3 firstTunnelPos = EntitySystem.Entity.ByName("TunnelSpawnPoint").Position;
_lastTunnel = Tunnel.Create(firstTunnelPos, 0);
_lastTunnel.Speed = LevelGeometry.GlobalGeomSpeed;
_tunnelElementsQueue.Enqueue(_lastTunnel);
_rotatingRingOne = EntitySystem.Entity.ByName("ring_2");
_rotatingRingTwo = EntitySystem.Entity.ByName("ring_3");
}
/// <summary>
/// Handles spawning of new tunnel elements and despawning of tunnel elements that are out of view.
/// </summary>
public void UpdateGeometry()
{
// Get first tunnel in Queue without removing the tunnel from the Queue.
Tunnel firstTunnel = _tunnelElementsQueue.Peek();
if (firstTunnel.Position.y < 450)
{
// Remove the tunnel from the Queue.
_tunnelElementsQueue.Dequeue();
// Purge door with related geometry (Door, Lights, ...).
firstTunnel.Purge();
}
Vector3 lastTunnelPos = _lastTunnel.Position;
if (lastTunnelPos.y < 700)
{
// Spawn new tunnel with door.
int newTunnelNumber = _lastTunnelNumber;
// Ensure the next tunnel element is different from the previous one.
while (newTunnelNumber == _lastTunnelNumber)
{
newTunnelNumber = Random.Next(4);
}
_lastTunnelNumber = newTunnelNumber;
_lastTunnel = Tunnel.Create(new Vector3(lastTunnelPos.x, (lastTunnelPos.y + 100f), lastTunnelPos.z), newTunnelNumber);
_lastTunnel.Speed = LevelGeometry.GlobalGeomSpeed;
_tunnelElementsQueue.Enqueue(_lastTunnel);
}
// Update background satelite rings
RotateSatelliteRings();
}